package ch02.demo;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import java.io.FileOutputStream;

public class Demo04 {
    public static void main(String[] args) {
        try {
            //得到DOM解析器的工厂实例
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            //从DOM工厂获得DOM解析器
            DocumentBuilder db = dbf.newDocumentBuilder();
            //解析XML文档，得到一个Document对象，即DOM树
            Document doc = db.parse("src/ch02/收藏信息.xml");
            //创建Brand节点
            Element brandElement = doc.createElement("Brand");
            brandElement.setAttribute("name", "三星");
            //创建Type节点
            Element typeElement = doc.createElement("Type");
            typeElement.setAttribute("name", "NoteX");
            //添加父子关系
            brandElement.appendChild(typeElement);
            Element phoneElement = (Element) doc.getElementsByTagName("PhoneInfo").item(0);
            phoneElement.appendChild(brandElement);
            //保存xml文件
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource domSource = new DOMSource(doc);
            //设置编码类型
            transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
            StreamResult result = new StreamResult(new FileOutputStream("src/ch02/收藏信息2.xml"));
            //把DOM树转换为XML文件
            transformer.transform(domSource, result);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
